Meaning

noun tall coarse perennial American herb having small white flowers followed by blackish-red berries on long drooping racemes; young fleshy stems are edible; berries and root are poisonous

noun someone who takes more time than necessary; someone who lags behind

noun a bag made of paper or plastic for holding customer's purchases

originFrom Middle English poken, perhaps from Middle Dutch poken or Middle Low German poken, both from Proto-West Germanic *pukōn or similar, which is itself of uncertain origin, but may be from an imitative Proto-Germanic root *puk-. Doublet of poach.

Etymology from Wiktionary, CC BY-SA 3.0